Cover for a canister



FIG. 1 is a perspective view of a cover for a canister, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an elevational view thereof; and

FIG. 5 is a sectional view taken along line 5--5 of FIG. 2. 

The ornamental design for a cover for a canister, substantially as shown. 